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No. 620,860. Patented Mar. 7, I899. J. WARRINGTON.

B R A N D U ST E R (Applidation filed Mar. 1, 189B.)

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N0. 620,860. Patented Mar. 7, I899.

J. WARRINGTON.

BRAN DUSTER. (Application filed min. 1,1898.)

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UNITED STATES PATENT OFFICE.

JESSE WARRING'ION, or INDIANAPOLIS,INDIANA, nssrenon or ONE-HALF TO THE NORDYKE a nARMoN COMPANY, or SAME PLACE.

BRAN-DUSTER.

sPEoIF'IcATIoNrorming part of Letters Patent No. 620,860, dated March 7, 1899.

Application filed March 1,1898.

To azZ whom it may concern.-

Be it known that .I, J ESSE WARRINGTON, a a

' citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Bran -Dus,ters, of which the followingis a specification.

My present invention relates to that variety of machines used in the treatment of grain products which are generally known as bran-dusters, by the use of which the bran is subjected to avigorous brushing, whereby all the finer particles are separated therefrom, so that the bran itself when it emerges from the machine is bran only-that is to say, con sists solely of the hard dry shell or covering of the grain, from which all of the flour and finer materials have been completely removed. a

In a machine such as is above briefly described, an improved variety of which is illustrated and described in this application, the bran,mixed with more or less of finer material, is introduced through a spout, as S, and falls onto a plate, as 22, over which it travels, under the impulse of centrifugal force, to the periphery thereof and falls thence down through the brushes, as 23, between said brushes and the surrounding cylindrical sieve fabric 18., In its passage the finer materialis thoroughly separated or dusted from the bran proper and is forced through the meshes of the sieve fabric to the outside, whence it falls down into asuitable receptacle provided. therefor,while the bran proper, being too large to pass through themeshes of the sieve, descends in time through the brushes to within the interior of the machine and is discharged through a suitable opening or openings in the bottom into a separate receptacle.

In such machines as heretofore constructed various disadvantages have been found to exist, which it is the object of my invention to overcome. It is of considerable importance to adjust the brushes from time to time relatively to the sieve fabric as the quality of material being treated varies and particularly as the brushes become shortened by wear. To do this has heretofore been a slow and difficult task. It is also of much impor- Serial No- 6'72,143. (No model-3' tance to counterbalance the pull upon the devices which carry the brushes and attached parts which results from the centrifugal force due to the motion of said parts.

My present invention consists in suitable means for overcoming the ,difficulties above enumerated and in certain details of construction and arrangements of parts of the mechanism of such a machine, all as will be hereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof and on which similar letters and numerals of reference indicate similar parts, Figure l is a perspective view of a bran-duster embodying my said invention, one side of the casing being removed to display the interior construction; Fig.2, a central vertical sectional view as seen from the dotted line 2 2 in Fig. 3; Fig. 3, aview partially in top plan and partially in horizontal section as seen from the dotted line 3 3 in Fig. 2, some of the horizontal portions being broken irregularly, and thus showing parts of all of them; Fig. 4, a detail vertical sectional view as seen from the dotted line 4. 4: in Fig. 2 Fig. 5, a horizontal sectional view as seen from the dotted line 5 5 in Fig. 2, and Fig. 6, Sheet 1, a detail sectional view as seen from the dotted line 6 6 in Fig. 3.

The main shaft 1is mounted at its lower end in a step-bearing 2, carried by the framework of the machine, and at the upper end in a suitable bearing 3 on the head or upper platform 4.. Upon its extreme upper end it has a small pulley 5, which, through a belt 6, drives a larger pulley 7, which runs on a short shaft 8, carried in a suitable step-.bearing9, also supported by the head 4 of the machine. As best shown in Fig. 4, there is a spur-pinion 10 also secured to this shaft 8, and this inturn meshes into a spur gear-wheel 11 on .a shaft 12, the latter of which extends through a sleeve-bearing 13 to below the head 4 of the machine and carries on its lowerend a spur- 5 pinion 14, which engages with the circular rack 15. Said rack is secured, by means of the plate 16, to the upper end of the framework 17 of the cylindrical sieve 18, and the sieve structure is thus enabled, by means of the ICC sweeps ordrags 19,to carry the material which has been forced through said sieve around to the point of discharge.

The plate 16 has formed therein just inside the circular rack 15 an annular groove, and an annular ring 20, secured to the under side of the head 4, enters said groove and guides the said structure at the upper end. At the lower end of the sieve structure an annular flange 21 serves to guide and keep said structure in place.

Within the ring 20 and forming a continuation thereof is a hopper-like flange f, and the material to be treated, which is introdueed into the machine through a spout or tube S, which passes thro ugh said head within the space inclosed by said ring and hopperlike flange, is thus kept from the working parts and guided on its way into the machine.

The shaft 1 carriesa plate 22, which covers the brush mechanism and also serves to receive the bran as it comes into the machine, which, as above stated, is first driven to the periphery of said plate and falls thence down between the sieve 18 and the brushes 23.

At points lower down on the shaft 1 are the spiders 24 and 25, upon which the brushbacks 26 are carried through suitable brackets 28 and 29 and bell-crank levers 30. Said bell-crank levers are connected at their inner ends by rods 31, and these in turn are connected by means of links 32 with a spider 33, which is mounted upon a sleeve 34, and the latter is carried by a suitable movable stepbearing 35, mounted on and carried by the in ner end of the lever 36. Said lever is supported at a central point on a pivot 37 from a bracket 38, which latter is carried by the framework of the machine, all as best shown in Figs. 2 and 5. The pivot 37 is carried by a short rock-shaft 39, which enablessaid lever to adjust itself in both directions.

The lever 36 is connected at its outer end to a rod 40, upon which are two nuts 41 and 42. Said rod is preferably hinge-mounted on a pivot 43. Obviously by adjusting said nuts the lever can be moved and through it the sleeve-shaft 34, the spider 33, the links 32, and the rods 31 may be forced upwardly, moving the bell-crank levers 30 on their pivots and forcing the brush-frames 26 outwardly. Oorrespondingly an adjustment of the nuts 41 42 in the other direction enables said parts to descend, retracting the brush-frame and brushes. By this means I am enabled to quickly, easily, and accurately adjust the brushes in relation to the sieve by which they are surrounded, thus both compensating for wear and securing the exact adjustment required for the proper efiect upon the material 'which is tobe treated.

The bell-crank levers 30 have weighted arms 44, which serve to counterbalance the centrifugal force of the brushes and attached parts when in motion.

The step-bearing 9 and sleeve-bearing 13,

as best shown in Fig. 4, unite in a flange or plate 45. This is secured to the head 4 of the machine by bolts or screws 46,which, as shown in Fig. 3, pass through curved slots therein. The entire structure is adapted to pivot about the shaft 12, being carried by the boss b, which passes through and is seated in a suitable pivot-bearing in the head 4 and is a continuation of the sleeve 13. To the opposite side of the structure in question is secured a rod 47, which, as best shown in Fig. 52, engages with a bracket 48 on the framework of the machine and has ahand-nut49 upon its outer end. By loosening the bolts or screws 46 and turning the hand-wheel 49 the belt 6 is enabled to be tightened or loosened, and when theparts are in adjusted position a retightening of the bolts or screws will secure the structure firmly in place.

I have provided a hammer or knocker 50, which is hinged to the side of the machine and is held against the framework 17 of the rotary sieve by a spring 51, the form and arrangement being preferably that shown in Fig. 3. As will be readily understood, as the framework 17 revolves it is given continual blows by this hammer 50, and any material which would otherwise adhere to the sieve 18 is thus dislodged.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is'

1. In a bran-duster, the combination, of a cylindrical sieve, a shaft passing through the same, spiders 011 said shaft, brackets mounted on the arms of said spiders, brush-sections, brackets on said brush-sections adjacent to those on said spider-arms, bell-crank levers each pivoted at its angle to one of said brackets on said brush-sections and at a point on one side of said angle to the adjacent bracket on the spider-arms and formed withinwardlyextending arms on the opposite side of said angles which are connected by rods, the weighted levers on the outer arms of said bellcranks, and means for operating them connected to the inner arm of each lower lever, all substantially as set forth.

2. The combination, in a bran-duster, of a cylindrical sieve, the shaft, a rotary-brush structure carried by said shaft within said sieve the brush-sections whereof are carried by bell-crank levers and are adjustable, said bell-crank levers being provided with weights extending outwardly from their pivot-points, whereby the centrifugal force of the brush mechanism is counterbalanced, and the adjusting mechanism, substantially as set forth.

3. The combination, in a bran-duster, of a cylindrical sieve, a brush structure within said sieve, a gearing connecting the sieve and brush structure substantially as described, one of the pulleys of said gearing being carried upon a pivotal point to one side of the center thereof, and an adj usting-rod connected to the structure which carries said pulley,

structure, gearing by which it is connected to saidsieve structure, and an ad ustmg-rod 15 whereby the structure carrying the last two named shafts may be adjusted to tighten or loosen the belt, substantially as shown and described.

In witness whereof I have hereunto set my 20 hand and seal at Indianapolis, Indiana, this 24th day of February, A. D. 1898.

JESSE WARRINGTON. [L. s.] W'itnesses:

CHESTER BRADFORD, JAMES A. WALSH. 

